How can I sort only the keys of my array that have the same value? [duplicate]

Question

This is my array (after I did asort):

array(4) {
  ["3"]=>
  float(24)
  ["4"]=>
  float(50)
  ["2"]=>
  float(50)
  ["1"]=>
  float(50)
}

It is sorted by the its value. This is ok, but in case the value is the same, I want to sort only these values by key.

If I use ksort(myarray) my array is sorted by keys:

array(4) {
  ["1"]=>
  float(50)
  ["2"]=>
  float(50)
  ["3"]=>
  float(24)
  ["4"]=>
  float(50)
}

But then it is not sorted by value anymore.

The result I would like to achieve is:

   array(4) {
      ["3"]=>
      float(24)
      ["1"]=>
      float(50)
      ["2"]=>
      float(50)
      ["4"]=>
      float(50)
    }

stackoverflow.com/questions/2282013/…

Sam Segers
– Sam Segers

2015-12-03 18:20:03 +00:00
Commented Dec 3, 2015 at 18:20 — Sam Segers
– Sam Segers, Commented Dec 3, 2015 at 18:20

Standej · Accepted Answer · 2015-12-03 21:03:39Z

1

Did you try this

ksort($myarray);
asort($myarray);

Edit: Explanation, when you first use ksort function your array will be sorted by key numbers and then you use asort function wich will sort array by its value and maintaining key order for elements with same values.

edited Dec 3, 2015 at 21:03

answered Dec 3, 2015 at 18:17

Standej

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4 Comments

Bono Over a year ago

While this code may answer the question, it would be better to include some context, explaining how it works and when to use it. Code-only answers are not useful in the long run.

peace_love Over a year ago

I already did asort with myarray, and after this I made ksort, so my solution is your solution only the other way around. So the result of your code is: myarray

Sam Segers Over a year ago

This is not deterministic correct. PHP sort may not be stable. stackoverflow.com/questions/12676521/…

Standej Over a year ago

Im on searching solutions

peace_love · Accepted Answer · 2015-12-03 22:21:14Z

1

I found the solution:

$tag = array(); 
$num = array();

foreach($myarray as $key => $value){ 
$tag[] = $key; 
$num[] = $value; 
}

array_multisort($num, SORT_ASC, $tag, SORT_ASC, $myarray);

answered Dec 3, 2015 at 22:21

peace_love

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